Geological timeline

Geological timeline

Mariana Arzoz Spada #4

PHANEROZOIC EON

541 MILLION YEARS AGO- TO PRESENT

• Pangaea began separating into the modern continents, and the modern Rocky Mountains rose.
• Dinosaurs, crocodiles, and pterosaurs ruled the land and air.
• As climate changed and rapid plate tectonics resulted in shallow ocean basins, sea levels rose world-wide and seas expanded across the center of North America.

• Fish diversified and marine organisms were very abundant.

• First fishes
• Trilobites dominant
• First organisms with shells

• Humans develop
• Age of mammals
• Extintion of dinosours and many other species
• Common Cenozoic fossils include cat-like carnivores and early horses, as well as ice age woolly mammoths.

• Extinction of trilobites and many other marine animals
• First reptiles
• Large coal swamps
• Large Amphibians abundant.

• The mountains began forming during the Ordovician.
• Elevations similar to Himalayas

AGE OF MAMMALS

EOCENE

PELEOCENE

AGE OF EARLY LIFE

AGE OF INVERTIBRATES

AGE OF REPTILES

AGE OF AMPHIBIANS

(54.8)

(65)

CARBONIFEROUS MISSISSIPIAN/PENNYSLVANIAN

TERTIARY NEOGENE

ORDOVICIAN

CAMBRIAN

(66-23 MYA)

TERTIARY PALOGENE

JURASSIC

TRIASSIC

(23-2,58 MYA)

(206MYA)

(490 MYA)

(540 MYA)

(490 MYA)

(323MYA)

(354 MYA

(era)

252- 66 MILLION YEARS AGO

66 MILLION YEARS AGO- PRESENT

541-252 million years ago

MESOZOIC

CENOZOIC

Paleozoic

PRECAMBRIAN

(4027 MYA)

DEVONIAN

SILURIAN

QUATERNARY

PERMIAN

CRETACEOUS

(2.58MYA - PRESENT)

(417 MYA)

(323 MYA)

(443 MYA)

(144 MYA)

OLIGOCENE

MIOCENE

PLIOCENE

(33.7)

(23.8)

(5.3-2.6)

PLEINSTOCENE

AGE OF AMPHIBIANS

AGE OF REPTILES

AGE OF FISHES

(2.6-0.01)

HOLOCENA

(.01- PRESENT)

Comprises about 88% of geologic time

(4500)

• Massive ice sheets advanced and retreated across North America during much of the QUATERNARY.

• First insect fossils
• Fishes dominant
• First land plants

• First multicelled organisms
• First one-celled organisms
• Origin of earth

(HADEAN EON, ARCHEAN EON, PROTEROZOIC)

• First rocks
• Massive volcanic activity
• Archean: first areas of continental crust appeared

• The earliest types of fossils to be found in any quantity are traces of microbial mats.

• The Pleistocene Ice Ages began about 2.6 MYA.
• The "Age of Mammals" also includes humans—the earliest known evidence of Homo sapiens in the fossil record is from 300,000 years ago.

• First flowering plants
• First birds
• Dinosours dominant
• Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils.

• The massive cliffs represent a Permian-age reef along the supercontinent Pangaea. The uppermost rocks of Grand Canyon National Park are also Permian.